Chuuuyaaa

During his teen years, Chuuya struggled with the possibility of not being human. His lack of memories from before he was seven, connection to Arahabaki and inability to dream made him suspect he was not really a human. This drove him to go to great lengths to find out his origins, even continuing to partner with Dazai after the Sheep hostages were released in hopes of figuring out what he was. Mori eventually got ahold of information regarding the experiments Chuuya had been a part of and used them as leverage to force him to remain a member of the Port Mafia. However, Chuuya stayed with the mafia even after learning of his origins as a modified clone.In general, Chuya comes off as an irritable and arrogant character, especially around Osamu Dazai, his former partner turned enemy and rival. He frequently smirks while in combat and is the type to criticize his opponents during combat.

He dislikes having to bargain or deal with the enemies and would much rather just fight them. This won't, however, keep him from completing the job. Despite his haughty, short-tempered attitude, he has always put the mission before himself.

When it comes to killing, Chuuya has the same mission-first attitude. He isn't particularly homicidal or overly brutal, but he will happily kill or torture if it's for his mission. He also has at least some sense of morality as shown when he was openly disgusted by Dazai shooting the corpse of one of his victims repeatedly. Chuuya is rarely unnecessarily violent during missions, as he quickly stopped fighting with Yosano and Kenji to negotiate with Fukuzawa, though he can become violent when provoked. He expresses disinterest at fighting those who can’t challenge him but doesn't care too much about who his opponents are if they can provide a challenge as he kicked Kenji into a wall with no hesitation despite the latter being only fourteen.